Molding-machine.



A. MCCARTE MoLDlNG MACHINE.

Ru. M1. 11T ,w 6H LA. p .AH .wn .fuS na mw ...a DL o.. M m nw E fr D E LH N w T A c U P P A WIr/VESSES A. IVIcCARTE. MOLDING MACHINE.

Patented Apr. 6, 1915.

APPLICATION FILED FEB. I3, I9I2.

3 SHEETS-SHEET 2.

Patented Apr. 6, 1915.

3 SHEETS-BHEBT 3.

A. MCCARTE. IVIOLDING MACHINE. APPLICATION FILED rss. 13. 1912.191534,39?.

UNITED STATES PATENT oEFrcE.

ALEXANDER. mqcAnTE, or NEW JENSEN, AssreNon 'ro :THE siNGEE.MANUEAGTUEING coMPANY, A coEronATIoN or NEW JERSEY.

HOLDING-MACHINE.

Specification of Letters Patent.

Patentediapr: 6,1915.

Application led February 13, 1912. Serial No. 677,331.

chines, of which the following is a speciication, reference being hadtherein to the accompanying drawings.

This invention relates to 'an improvement in that class of sand-moldingmachines comprising a traveling flask-support with means for impartingto it step-by-step operative movements whereby the movement ofl a flasksupported thereon is arrested at a plurality of stations in eachexcursion o' the support from initial position, combined withsuccessively, acting flask-iilling, tuckingI and strike-ofil meansdisposed at one ofy said stations and mold-pressing means disposed atanother of said stations.'

The present invention has for its chief -object to provide an effectiveflask-support with means for insuring .its intermittent travel withfixed periods of rest and 'effective means for handling the iiasks andpatterns sustained thereon.

ln the preferred embodiment of the improvement, the desk-sustainingmeans con- 'sists of a rotary turret of polygonal form having secured toeach side a carrier for the flask which supports also a patterncarriermovable vertically relatively there-- to. A ask and a pattern is mountedeach upon its respective carrier at each of the several sides of theturret which are carried successively beneath a sandlling apparatus anda mold-pressing machine, the

, molds thus formed being thereafter removed at' a succeeding stationand replaced by empty asks for a repetition of the moldformingoperation. The turret is in practice provided with a series of radialchannel-ways and intermediate peripheral cavities, the former beingentered by. a crankstud upon an actuator provided with a segmental lstopmember adapted to enter the peripheral cavities of the turret 'andalternating withthe crank-.stud in advancing the turret from one stationto the next in which i( is positively locked for a dente interval untilthe succeeding advance movement. lThe flask-carrier -is provided withself-lubricating guides for the pattern-earrier mounted therein and witha detachable iask-su'pporting wearing frame `within which 1s closelyitted the removable wearplatev surrounding the pattern-plate to whichthe pattern is secured, thus providmg -tor the replacement of thewearing parts operating in contact with the sand. Rockshafts are mountedat opposite ends of the flask-supports and provided with flask-lift--ing arms, suchA rock-shafts being connected forl reciprocal movementunder the action of a stationary cam member in the approach of eachpattern-carrier, to mold-removing position and recession thereform. Theturret is provided with cleaning brushes for clearing the top of thepress-platen from sand. ,and with pattern-heating burners whose fuelsupply is partially interrupted to reduce the size of the flames as thecleaning brushes pass over them.' Means are pro- 'videdfor clearing thetop of the turret of the superfluousy sand dropping on the same from thesand-filling apparatus, and for operating the several pneumatic andhydraulic valves by which various parts of the apparatus are actuated.

In the accompanying drawings, Figure l is a plan of the entirestructure, including the turret, the sand-filling and sand-pressingmeans.v Fig. 2 is a sectional elevation of thetu-rret and its actuatingmechanism, and Fig. 3 a plan of the same, representing also thehydraulic valve mechanism. Fig. 4 is an enlarged partial sectional planview showing one of the flask-carriers and pattern-carriers and theiraccessories,l and Fig. 5 a sectional eleva-tion of the'same. Fig. 6 is aperspective view, upon a 'smaller' scale, of one of the pattern-heatingburners and the cleaning brushes with a portion of the turret, and Fig.7 an enlarged transverse sectional elevation of one of the burners. Fig.8 is a under side view of the turretactuating mechanism, with the diskhaving ings, the entire apparatus is mounted upon a common bed-plate 1formed'centrally with a Well 1x over which the hub of the turret isarranged, and upon lateral extensions of which bed-plate are mounted thefames 2 and 3 of the flask-filling and mold-pressing apparatus,respectively.

.The turret' is sustained by the arched base member-4 constructed withthe bottom ange 5 secured upon the bed-plate 1 and having the topsurmounted by a circular plate 6 with 'the central internally steppedboss 7 to which is fitted the externally stepped bushing 8 having anexternally threaded lower end to which is fitted the threadedthrust-collar 9 by means of which the bushing is-drawn downwardly tofirmlyseat its yslightly taper external faces upon those of the boss 7.

The bore of the bushing 8 is upwardly flared to receive the taperexternal surface of the hollow hub 10 of the turret which has formedintegral with said hub the disk 11 and the radial ribs or arms 12carrying the outer rin 13 somewhat above the disk 11 formed withdepending ianges 14 in hexagonal arrangement. The disk 11 has adepending rim 15 having a facing ring 16 between which and a similarfacing ring 1 7 upon the top plate 6 of the base 4 is a series ofanti-friction balls 18 confined against lateral displacement by means ofthe inner and outer rings 19 and 20. To each of the depending flanges 14is secured by means of the clamp-bolts 21 and 22 the side member 23 of ayoke having parallel end members 24 extending in substantially radialrelation with the turret and affording a sustaining member for one oftheflask-carriers.

To the cylindrical lower end portion of vthe turret-hub is securedagainst turning by means of the key 25 the hub of a disk 26 which issustained firmly seated against the collar 9 by means of the internallythreaded collar 27 applied to the reduced and threaded extremity of thehub 10.

Up on the top of thedi'sk 26 are secured by means of bolts 28 a seriesofI cam-plates 29 having convergent straight edges 30 in substantiallyradial relation with the turrethub, concaved inner edge 31 restingagainst an annular shoulder 32 of the disk 26 and concaved outer edge33. The nearer straight edges 30 of the adjacent cam plates 29 arespaced apart to ,form radial channel-ways adapted to be enteredsuccessively by a roller 34 journaled upon the depending lower end of ashouldered stud-bolt 35 secured by means of the nut 36 in an aperture inthe peripherally toothed outer portion 37 of a sectional Worm-wheelwhose inner or hub portion 38 is fixed upon the vertical shaft 39 havingthe upfper end journaled Within the bush1ng740 o a bearing boss 41extending laterally from the turret-sustaining base-member 4, and Whoselower end is journaled in a step bearing aiforded by the bushing 42having in its closed lower end the wearing piece 43 and fitted withinthe bearing boss-44 having its foot-piece 45 securedvby means ofscrew-bolts 46 upon the bed 1.1

To the lower face of the inner worm-wheel section 38 is secured by meansof the bolts 47 the segmental cam-disk 48 having a radius of curvaturethe same as that of the concaved outer edges 33 of the cam-plates 29 andarranged in a position diametrically opposite the stud-bolt 35.The-peripheral teeth of the Worm-wheel section 37 mesh with a worm 49ixed upon the driving shaft 50 which -is journaled in bearing bosses 51-of a bracket 52 secured by means of screwbolts 53. upon the bed 1, saidshaft carrying the belt-driven pulley 54 by means of which the shaft 50is driven to impart to the wormwheel through the worm 49 a continuousrotary motion.

As will be observed, in the position of the parts represented in Fig. 8,the cam-disk 48 fits within the concaved outer edge of one of thecam-plates 29 and thus securely locks the disk 26 of the turret againstcircular movement. As the worm-wheel continues to rotate, the roller 34is caused to enter the channel-way between the adjacent edges of two ofthe cam-plates 29 at the point when one extremity 0f the cam-disk 48 isin radial 'relation with both the turret-hub 10 and the shaft 39, asrepresented in Fig. 8. The continued movement of the worm-Wheel carriesthe roller 34 through a circular arc embracing a portion of the disk 26and thereby causes the movement of the latter through an angle of, inthe present instance, 60, during which the concavity 33 of the cam-plate29 recedes from the adjacent edge of the camdisk 48 to permit the freemovement of the disk 26, while the opposite extremity or anf gle of thecam-disk 48 approaches one extremity of the kconcavity 33 of thesucceeding cam-plate 29, as represented in Fig. 9, which it engages justas' the roller 34 emerges from its guideway between the camplates. Theengagement of the cam-disk 48 -with the succeeding cam-plate 29 causesthe relooking of the disk, and hence of the turret, against circularmovementA for another period during which the roller 34 -moves aroundthe shaft 39 for entrance into a succeeding channel-way between thecam-plates.

The channel-ways between the cam-plates 29 are so disposed with relationto the roller 34 that a slow starting movement is imparted to theturret, the speed of this movement gradually increasing until the turretapproaches stopping position when the roller acts upon the turret withconstantly decreasing effect, reducing its momentum to a By the meansjust described, the turrety or flask-support is given an intermittentrotary motion with periods of rest whereby the movement of the flaskssupported thereby is interrupted at a plurality of stationscorresponding with the number of flasks in each rotation or excursion ofthe turret from an initial position to itsreturn to the same position,and the means for operating upon the sand in forming the mold are spacedapart at successive stations of the turret where the asks are lockedduring certain of their periods of rest'.

Each of the parallel yoke members 24 is formed at the top with a lateralflange 24x whose upper face affords a seat for a lateral fiange 55extending outwardly from the top of an open-bottomed rectangular box orcasing 56 constituting the flask-carrier and having applied to its upperand inner faces and secured thereto by means of screws 57 the wearingframe 58 of inverted L-shaped cross-section. The upper face of thewearing frame 58 affords a seat upon which rests the open bottom of thesnap-flask 59 which is shown herein divided at diagonally oppositecorners to one of which is applied the hinge 60 (Fig. 1) and to theother of which is applied a latch device 61 of any well known orsuitable construction.

Secured to opposite sides of the fiask by means of bolts 62 are handlebrackets 63 having the handle pieces 64, the brackets being providedwith laterally extending bosses 65 in which are secured by means ofclamp-v nuts 66 applied to their threaded ends the shouldered v bolts 67having depending steady-pins 68 entering suitable eyes 69 in bushings 70within apertures 71 formed in the lateral fianges 55 of theflask-carrier. As the embodiment of the present improvement shown anddescribed herein is designed for producing two-part molds requiringalternate operation upon the cope or upper fiask-section and the drag orlower flask-section, respectively, the steady-pin 68' land the eye forreceiving it are in practice inversely arranged in the different flasksections for interengagement when the sections are brought together toform the complete mold, and the lateral flanges 55 of the successivefiask-carriers are correspondingly arranged for maintenance of thedesk-sections against displacement in the moldformin operations.

The ask-support 56 is provided upon the opposite faces of its inner wallwith inwardly extending lugs 7 2 having threaded apertures to which arefitted the bearing screws 73 having jam-nuts 74 -and upon whosev upperends rest the heads of bearing pins 75 carried by lateral extensions 76of a hollow box 77 constituting the patternsupport whose closed upperend 78 affords a fiat seat for the pattern-plate 79 to which the patternsection 80 is secured. Upon the margin of the pattern-supporting plate78 is secured by means of screws 81x the rectangular wear-plate 81 whoseouter faces are tted loosely to the adjacent faces of the wear-frameinclosing the same, and to whose inner faces the adjacent edges of thepattern-plate 79 are fitted.

The pattern-supporting plate 78 has formed therein at a point near eachof its four corners an aperture in which is secured the reduced upperend 82 of a depending plunger-rod 83 fitted within a bushing 84 formedwith annular bearing ribs 85 which are themselves fitted within atubular bearing boss 86 rigidly connected with the adjacent walls of thebox or easing 56 by means of the wings 87 cast integrally therewith. Thelower end of the boss 86 is closed by means of a screw-plug 88, but itis open at the upper end, and the bushing 84 is formed at the lower endand intermediate the ends with transverse apertures 89 and 90 toestablish communication between the interior and exterior of thebushing, and the annular ribs are interrupted at several points aroundthe circumference to form .shallow channels 91 to establish communi--cation between the upper and lower ends of the bearing boss 86. Thebushings 84 not only afford guides for the plungers 83 to properlydirect the pattern-carrier in its vertical movements, but, the otherwisevacant space within the bearing boss 86 being filled with heavy oil orother liquid, they serve to provideI lubricant to insure the freemovement of the pattern-carrier.

To the lower face of the pattern-supporting plate 78 is secured by meansof screws 92 the wearing plate 93 against the lower operative face ofwhich rests the roller 94 mounted upon a transverse pin 95 in the forkedouter end 96 of a crank-arm 97 whose hub 98 is fixed upon the rock-shaft99 mounted in transversely arranged bearing bosses 100 of thelask-supporting casing 56. 'llhe'rockshaft 99 has fixed upon its outerendpby means of the pin 101 one end of a lateral crank-arm 10Q whoseouter end carries a headed journal-pin 103 upon which is mounted theweighted roller 104. 7When the pattern-carrier moves upwardly under theaction of the ram from the initial positionrepresented in F igs. 4 and5, in the moldwear-plate 81 ,and pattern-plate 79 ush with the top ofthe wearin frame 58 and 'the bottom of the flask 59. he pattern-carrieris maintained in this elevated position until the turret performs itsnext partial rotation, when the weighted roller 104 eucounters theupwardly inclined operative edge of asta'tionary cam-plate 105 securedby means of stud-bolts 106 and spacing bushings 107 to the rim of theplate 6 of the turret-sustaining base-member, by means of which the arm102 is gradually raisedtov turn .the rock-shaft 99 and thereby swing thecrank-arm 97 laterally to cause the detaining roller 94 to assume itslower position,

thereby permitting the pattern-support to descend by gravity to initialposition.

' As before indicated, the pattern 80 is rigidly secured to the patternplate 79 resting upon the supporting plate 78 of the carrier 77 andconfined against lateral movement thereon by contact with the adjacentwalls of the wear-plate 81. To facilitate the disengagement of thepattern from the finished mold without injury of the same dur- .ing theretraction-of the pattern-support, the plate 78 has rigidly secured toits lo'wer side aI pneumatically actuated vibrator or jarring device bymeans of bolts 108 entering apertures 109 in lugs 110 of the cylinder111. The vibrator-cylinder has fitted uwithin the same a reciprocatingplunger of well vknown construction and is provided in one side with theexhaust port 112 and in the opposite side with two spaced inlet ports113 connected by a channel 114 in the projecting boss 115, the inletchannel being connected with the air-supply pipe 116 entering slots 117and 118 formed to receive the same in the yoke member 24 andflask-support 56, and passing through an aperture 119 in the side wallof the pattern-support. The admission `of air to the vibrator cylinderthrough the supply-pipe 116 during and subsequent to themold-compressing operation produces sulicient jarring of the parts toprevent adherence of particles of sand t0 the pattern when the latter islowered from the interior of the flask section.

The liange 55 of the flask-support has secured upon its upper face, atopposite ends thereof, by means of screws 120 the bearing blocks 121 inwhich are journaled the parallel rock-shafts 122 each providedintermediate its ends with a pair of forked lateral flask-lifting arms123 extending upon opposite sides of the bushing and each carrying aroller124 lying intermediate the flasksupport ange 55 and a flat seat125 of the handle-bracket 63.

The flask-support or carrier has secured in its forward side by means ofthe nut 126 the shouldered fulcrum-stud 127 upon -which is 7|proportioned that the 'crank-plate acts by gravity to maintain thelifting' arms 123 in their lowered positions. i

Secured to the frame 3 of the mold-pressing apparatus by means of'fastening bolts 135 is the foot 136x of the laterally extend; ingbracket 136 constructed with an upwardly extending rib whose upper edge137 is upwardly inclined relatively to the path of travel of the turret,and by engagement with the roller 132 causes the rocking of the shafts122 and the forcible. engagement of the lifting rollers 124 with thehandlebrackets 63 so as to lift the flask for removal by the attendantinthe movement of the turret following a mold-compressing operation.

.The cam-edge 137 is provided near its forwardv end with a downwardlyinclined portion 137 x, and the web of the bracket 136 is provided withan overhanging lip 138 whose lower face serves to confine the rollerbetween itself and the camportion 137 x to insure the retro ade movementof the crankplate in the inltial travel of the flask-carrier from theflask-removing station, thereby causing the depression of theflask-lifting arms 123 for reception of the flask section for asucceeding mold-forming operation thereon.

As represented more fully in my application Serial No. 602,354, .filedJanuary 12, 1911, the mold-compressing apparatus includes ahydraulic-cylinder having a platen 139 normally disposed lslightly belowthe path of circular movement of and in register with the facing plate140 which is secured by the bolts 141 to theinwardly extending lange 77X of the pattern-supporting box or casing 77. It is obviously desirableto keep the operative face of this platen free from sand, and to thisend the turret is preferably provided with a series of depending brushesdisposedv intermediate the adjacent flask-carriers, and each .comprisingbunches of bristles 142 secured in the wooden back- -ings 143 which areclamped within the channeled holders 144 by means ofthe stud-bolts 145and interposed wearing strips 146. Each of these holders is secured toan anglepiece 147 one of` whose members is formed with a slot 148entered by the reduced outer end of the shouldered stud-bolt 149 tappedinto the side of the pattern-supporting member 56 and secured 1n itsvertical adjustment by means of the nut 150 and waslier 151.

Beneath each pattern-supporting member 7 8 in its position of restbetween turret actuations is disposed a heating burner comprising aflaring rectangular casing 152 open at the bottom within andlongitudinally of which is secured the burner-tube 153 with lateral jetapertures 154. Each of the tubes 153 is connected with an upright feedpipe 155 provided with a stop-cock 156 and connected with thedeliverypipe 157 in practice extending entirely around the turret.Connected with the delivery-pipe 157 is the supply-pipe 158 incommunication with the valved air-supply and fuel-supply pipes 159 and160, respectively, by means of which air and gas may be mixed fordelivery to the several burners, the mixture being regulated by thevalves in said pipes, as shown in Fig.

l 6. The air supply pipe 158 is formed with a loop 158x containing aregulator valve 161 whose stem has secured thereon the lever 163normally held in upright position7 to maintain the valve open, by meansof a spring 164 attached to the pipe 157 or some other stationary part.The upper arm of the lever 163 carries a roller-stud 165 adapted forengagement with the lower operative edge 166 of a cam-bar 167 secured bymeans of a bolt 168 upon the lower edge of the flange 14 adjacent eachof the cleaning brushes 142. The parts are so arranged and proportionedthat the lever 163 is tilted in opposition to its spring 164, asrepresented in Fig. 6, just as the brllsh 142 a proaches the burner, theformer being so re uced that the bristles are not scorched in theirpassage over the same between stations.

Secured upon the frame 2 of the flaskilling apparatus` overhanging theturret is the shouldered depending stud-pin 169 upon the lower end ofwhich are journaled the bearing pieces 170 attached to the scraperblade171 to the lower margin of which is secured by means of bolts 172 thewearing strip 17 3 of leather or other leXi-' ble material. A. spring174 surrounding the stud-pin 169 serves to maintain the scraperyieldingly in inclined relation with the adjacent flange 14 of theturret, with its body portion 171 in engagement with a stop-pin 175depending from the stational-y frame 2. At one end of the blade 171 issecured the bearing bracket 176 carrying the anti-friction roller 177which is adapted in practice for engagement with the inner side of theflask 59 in the travel of the latter between stations, thereby delectingthe scraper and preventing its disarrangement by moving parts ofthemachine. As

represented in Fig. 1, the scraper is so disposed that in the travel ofthe turret it vserves to eject from the top of thel same between theadjacent corners of the flask-carriers any sand which is spilled fromthe fillmg apparatus in strikin oi the residue from the flask after eachling operation.

The turret-hub 10 is formed with the central cavity 10x through whihpasses the axially arranged tubular valve-stem 178 having in itsotherwise closed lower end the nipple 179 connected with the compressedair su ply pipe 180. Secured upon the external y threaded upper end ofthe valve-stem 178 1s the hub 181 of the hollow conical valveplug 182formed in its upper end with the divergently inclined apertures 183 andhaving a slngle radial aperture 184 adapted for communicationsuccessively with a series of radial ports 185 of a conical valve-seatafforded in the center of the cap-plate 186 secured by screws 187 uponthe top of the turret-hub 10. In each o the ports 185 is lntroduced oneend of a radial air pipe 188 to whose opposite end is connected one endof a flexible hose 189 having its other end attached to the air pipe 116leading to the inlet chamber of the cylinder 111 of the pattern vibratoror jarring device, and shown provided with the oil-cup 116".

Fixed upon the externally threaded lower end portion of the tubularvalve-stem 178 is the hub 190 of a crank-arm 191 pivotally connectedbymeans of the pin 192 with one end of a link-bar 193 having its oppositeend 194 formed to embrace the worm-wheelshaft 39 and having aroller-stud 195 entering a cam-groove 196 in the cam-wheel 197 whichisixed upon the worm-wheel shaft. The rotation of the cam-wheel 197 withthe shaft 39 causes the link-bar 193 to turn the valvestem 178 so as toopen the air valve just about as the press-platen 139 commences to risefor a mold-compressing operation,and to maintain the valve open untilabout the time that the pattern is withdrawn from the mold by thedescent of the pattern-carrier, during all of which period the vibratoris kept in operation to jar the pattern so as to prevent adherence. ofparticles of sand thereto. The cam-groove 196 is so shaped as tocompensate for the advance of the turret during the desired period ofoperation of the vibrator, and this period may be varied in length byadjustment of the crankarm 191 upon the hollow valve-stem 178.

Fixed upon the top of the cap-plate 186 b v means of screws 198 is aconical valveplug 199 having upwardly extending externally threadednipple 200 and provided with a series of radial ports 201 correspondingin number and arrangement with the flask-V carriers of the turret.Fitted upon the conical exterior of this valve-plug and alfordin a seattherefor is the bushing 202 provide with a series of radial ports 203corresponding in number and spacing with those of the hub surroimdingthe ports 203 of the bush-v ing 202.

The socket of the arm 207 has secured therein one end of a blow-off pipe209 which is in 'practice led laterally toV a position somewhat inadvance, in the direction of the turret rotation, of the press-platen,Where' it is in practice provided with a downwardly extending nozzle forclearing the sprue-hole as a finished mold passes beneath the same tomold-removing position. The ports 201 and 203 are so proportioned andarranged that thel blow-out valve is closed while the turret is at rest,but is open while each iinished mold is passing from the compressing tothe removing station, the blow-out pipe being maintained stationary atall times and the step-by-step rotation of the valve-plug" 201 with theturret serving to openA and close the ports as described. As shown inthe drawings, the nipple 200 is provided with an axial oil duct 210havingan internally threaded socket at the upper end in which isscrewed'the oil-cup 211 which supplies oil to the valve-plug 182 bymeans of the tube 212 whose lower end is seated upon the conical upperfacev of the valve-plug 182 and which is prevented from turningtherewith by means of the radial pin 213 extending from the same into asuitable aperture in the fixed valve-plug 199, which is itselfproscrew-plug 215.

vided with oil from an annular cavity 214 supplied through an oil holeclosed by the f, AS Shown` in Fi 2 and 12, the bearing ofthe valve-stem1 8 in the lower portion of the turret-hub is lubricated by means of thebent pipe 216 extending from the cap-plate 186 downwardly through thecentral cavity 10".of the turret-hub 10. As a convenient means oflubricating the conical bearing of the turret-hub 10 in the bushing 8,the inclined oil-pipe 217 is secured in the-disk 11 of the turret and isnormally closed by means of the cap 218.

As shown and described more fully in i an application Serial No.677,332, filed February 13, 1912, filed simultaneously herewith, theflask-filling apparatus comprises a sandhopper, a reciprocating sand-boxmovable from a position beneath the same to a position at the sidethereof and directly above the flask to be filled and provided with arelatively movable bottom, these several parts being actuated by meansof hydraulic rams, as well as the tucker 219 which descends to pack the4sand around the pattern previous to the retraction of the sand-box tostrike 0H the superfluous sand from the flask. As before stated, thepress-platen 139 is actuated by a hydraulic ram, as is also thesprue-plug which descends through the upper asksectionfinto thesprue-socket 220 of the pattern-gate 221 (see Fig. 1). v To effect theactuation of these several hyy draulic rams in the proper relative timins, a valve mechanism is employed which erives its operative movementsfrom a connection with the turret actuator. As re resented in Figs. 2and 3, the hydraulic va vechest 222 is secured upon the bed-plate 1 gybolts 223 passin through its feet 224. his valve-chest is ormed withlongitudinal supply and exhaust chambers 225 and 226, respectively, andan intermediate series of independent distributing chambers 227. Thesupply and exhaust chambers are connected respectively with the supplyand exhaust pipes 228 and 229 tapped into the bottom of the casing, andeach of the distribu- `ting chambers is connected at the lower side witha pocket 230 in communication with one of a series of distributing orservice pipes 231 also leading from the bottom of the valve-chest; theseservice pipes being led to the different parts of the apparatus, asrepresented in plan in Fig. 1. The casing is provided with a series oftransverse slightly tapered apertures each arranged centrally 190 of oneof the distributing chambers 227 in which is fitted a tubular valve seat232 of corresponding taper form exteriorly but having a cylindricalinner face communieating with the chambers 225, 226 and 227,respectively, by means of the annular series of apertures 233. The tube232 is maintained rmly seated in its aperture in the chestby means ofthe nut 234 applied to its closed end, and within the tube 232 is fitted1U the piston 235 whose stem236 is passed through a suitable stuffingbox 237 and provided with a forked head 238 in which is secured by thepin 239 one end of the link bar 240 whose forked opposite `end portion*la 241 embraces the cam-shaft 242 upon which are secured the severalactuating -camwheels 243 each having a cam-groove 244 entered by alateral stud245 of the link-bar 240. The cam-shaft 242 is connected by apair of bevel-gears 246 with the worm-wheel shaft 39 from which itderives its operative movements. As will be readily seen, the rotationof the cam-shaft 242 causes the reciprocation of the valve pistons 2,35,whereby communication is'established alternately between the centraldistributing chambers and the supply and exhaust chambers, respectively,thereby controlling the supply of liquid in magen? The turret being inthe position shown in Fig. 3, power is applied to shaft 50 by means ofthe pulley 54, the worm-'wheel 37 being thereby rotated by means of worm49, thus rotatin the turret until the roller 34 is disengage from one ofthe channel-ways formed by the cam-plates 29, as seen m Figs. 8 and 9.At this'point the turret is held against further rotation by the camdisk48 which engages the concaved outer edgeof one of the cam-plates 29. Bysuch rotation of the turret one of the flask-carriers 56 supportedthereon and carryin a flask 59 is placed under and re sters wit aflask-filling apparatus, which orms no part of the present invention butwhich is indicated by numeral 2, Fig. l. At this point the saidfiask-lling apparatus is operated by means lof certain hydraulic ramsautomatically actuated by the valve mechanism shown in Fi 2 and 3 whichderives its movements t rough connections with the worm-wheel 38, ashereinafter described with respect to the hydraulic press. After theflask has been filled and the sand evenly distributed over the patternby means of a tucking member forming part of said flaskfillin device,the roller 34 meets the succeeding c annel-way in the' turret-disk andthe turret is revolved another step, carryin the filled flask beneath ahydraulic press w ich, also, forms no part of the present invention butwhich is indicated in Fi 1 by numeral 3. As the flask is presente underthe hydraulic press, the cam-shaft 242, operated by the worm-wheel 38through the intermediaries shown in Figs. 2 and 3, causes reciprocationof the valve pistons 235 and liquld is admitted through service pipes231 (Fig. 1) to said hydraulic press, thus operating the press-platen.As the press-platen commences to rise for a mold-pressing operation, avalve-stem 178, mounted within the turrethub, is turned through theintermediary of the link-bar 193 and cam-wheel 197, which permits air toflow through radial air pipe 188 to thefvibrator 111, mountedwithin thepattern-carrier 78, as shown in Figs. 3 and 4. Said vibrator is actuateduntil about the time the pattern is withdrawn from the mold by thedescent of the pattern-carrier' as hereinbefore described, its functionbeing to facilitatethe disengagement of the pattern from the finishedmold. After the press-platen has raised the pattern-carrier 78 inpressing the mold and has retracted therefrom, said pattern-carrier isretained in its upward position by means of detentarm 96 which isautomatically raised into operative position by means of weighted arm102, as seen in Fi 4 and 5. After the operation of the hy raulic-pressand the gate-forming mechanism carried thereby, the roller 34 of theworm-wheel 37 meets the succeeding channel-way in the turret-disk andthe turret is rotated another step. During such partial rotation thedetent-arm is released by the contact of a roller on weighted arm 102with an upwardly inclined camplate 105 (Fig. 2). ln the meantime theplaten of the hydraulic-press has been freed of sand by one of thebrushes 144 disposed between the advancing fiask-carrierand thesucceeding flask-carrier, as shown in Figs. 4 and 5; and thepattern-support 78 has been maintained in heated condition by means of aseries of burners disposed beneath the path of the flask-carriers. Asthe brushes 144 meet a burner and pass over the same, the flame isdiminished bythe engagement of a cam-bar 167 with regulator-valve lever163 of the burner. At the end of the turret movement which carries theflask and its support away from the hydraulic-press, the flask isautomatically lifted from its support and the pattern, and the steadypins 68 partlally disengaged from their sockets 69, by

the engagement of roller 132 (Fig. 4) with an upwardly inclined bracket136 (Fig. 1),

which elevates said roller to operate rockshafts 122, the lifting arms123 of which engage the flask. At this point the flask with itscompleted mold section is lifted from the rarrier and an empty flasksubstituted there- While l have shown and described specifically hereinthe preferable manner in whlch the present invention is carried intoeffect, it is evident that the improvement is susceptible of verymaterial modification in the construction and arrangement of its parts,and that various ones of its several features may be omitted or modifiedindividually without departure from the scope of the invention.

Having thus set forth the nature of the invention, what l claim hereinis 1. In a molding machine, the combination with a support, of aflask-sustaining carrier mounted for rotary movement upon said supportand driving means for said carrier comprising a continuously movingactuator, means supported by the carrier and engaged by the actuatorwhereby the carrier is given intermittent rotary movements beginningwith gradually increased speed and ending with gradually decreasedspeed, and turret detaining means carried by said actuator whereby thecarrier is periodically locked against movement.

2. 1n a molding machine, thc combination with a desk-sustaining turretprovided with a series of radial channel-ways and intermediateperipheral cavities, of an actuator for the same carrying a crank-studadapted to enter successively said channelways and provided with 'asegmental stop memberarranged upon the opposite s1de of its axis ofmovement from said crank-stud and having a periphery adapted to entersaid cavities of the turret and to temporanly detain the latter fromturning. l

3. In a molding machine, the combination with a flask-.sustainingturret, of a disk rigidly connected with the same and provided with aseries of segmental plates spaced apart to form radial channel-ways andformed with arcuate cavities in and centrally of their outer edges, anactuator carrying a crank-stud moving m a path 1ntersecting saidchannel-ways and prov1ded with a segmental stop member arrangeddiametrically opposite said crank-stud and -having a peripherycorresponding in curvature with that of said cav1ties, and means.

for imparting operative movements to said actuator.

4. In a molding machine, the combination with a ilask-sustaining turretprovided with `a series of radial channel-ways and intermediateperipheral cavities, of an actuator for the same in constant engagementtherewith, carrying a member adapted to enter successively saidchannel-ways, and

also a member to enter successively said peripheral cavities, tointermittently turn and to intermittently hold said turret 1n fixedposition, substantially as shown -and set forth.

5. Inv a molding machine, the combination with a support, of a pluralityo f flasksustaining carriers mounted upon said support and each providedwith a plurality of parallel tubular sockets, bushings tted within' saidsockets and provided with central guiding apertures land with externaloil-ducts having connections with the central apertures, andpattern-carriers each sustained by one of the flask-carriers andprovided with a plurality of depending plungers entering theguide-apertures of said bushings.

6. In a molding machine, the combmation with a support, of a pluralityof flasksustaining carriers mounted upon said support and each providedwith a plurahty of parallel tubular sockets open at the upper ends,bushings tted within said sockets and each provided with a centralguiding aperture and with external oil-ducts having connections with thecentral aperture at different points in the latters length, andpatterncarriers each sustained by one of the flaskcarriers and providedwith a plurality of depending plungers entering the guideapertures ofsaid bushings.

7. In a molding machine, the combination with a support, of aflask-sustaining carrier mounted upon said support, a pattern-carriersustained by and movable verti- 'caused to descend.

8. In a lmolding machine, the combination with a support, of aflask-sustaining carrier mounted upon said support, a pattern-carriersustained by and movable vertically, relative to said carrier, arock-shaft mounted within the flask-sustaining carrier beneath thepattern-carrier, a crank-arm mounted upon said shaft and having itsouter end adapted for engagement With the pattern-carrier for sustainingthe same in elevated position, a weighted arm fixed to said shaft uponthe side thereof opposite said crank-arm, and means for elevating saidweighted arm to rock said shaft for the release of the pattern-supportfrom elevated position. l

9. Ina molding machine, the combination with a support, of aflask-sustaining carrier `mounted upon said support, aApattern-carriermovable vertically relative to said flaskcarr1er, a removable wearingframe carried by said flask-carrier, and a removable wear-- ing framecarried by said pattern-carrier and engaging the inner walls of theaforesaid wearing frame, substantially as shown and described. Y

10. In a molding mal/nine, the combination with a flask-support, and ailask mounted thereon, of a plurality of rock-shafts provided with flasklifting means 'mounted upon said support, a crank-plate mounted uponsaid support, connections between said crankplate and rock-shafts, andmeans intermittently engaging said crank-plate whereby Athe same isautomatically actuated vto lift said flask and is automatically andpositively actuated to retract said flask lifting means. 4

11. In a molding machine, the combina- 'tion with a flask-support, of aflask,`steady pins attached to said flask and entering sockets formed inthe flask-support, parallel rock-shafts mounted upon said support andeach provided with a crank-arm engaging said flask at points adjacentsaid steady pins, a crank-plate mounted upon said support,crank-and-pitman connections between said crank-plate and saidrock-shafts and means intermittently engaging said crankplate wherebythe same is automaticall actuated to lift said flask and is automat1-cally and positively actuated to retract said crank arms.

12.' In a molding machine, the combination with a flask-support, of aflask, steady pins attached -to said flask and entering sockets formedin the flask-support, parallel rock-shafts mounted upon said support andeach provided with a crank-arm engaging nid flask at points adjacentsaid steady pins, a crank-plate mounted upon said support,crank-and-pitman connections between said crank-plate and saidrock-shafts, and actuating means automatically operating atpredetermined intervals for actuating said cranklate.

13. n a molding machine, the combination with a desk-sustaining turret,a plurality of flask-carriers mounted thereon, and pattern-carrierssustained by said flask-carriers, of a pneumatic vibrator secured toeach of said pattern-carriers, an air-valve mounted upon said turrethaving one member rotating with the turret and provided with a series ofradial ports, a non-rotating valve member co-acting with said rotatingmember, connections between said ports and the several vibrators, andautomatically acting means for operating said air-valve.

14. ln a molding machine, the combination with a rotary Hash-sustainingturret, a plurality of ilask-carriers mounted thereon, andpattern-carriers sustained by said flaskca-rriers, of a pneumaticvibrator secured to each of said pattern-carriers, an air-valve mountedupon said turret having one member rotating with the turret and providedwith a series of radial ports, a co-acting valve member adapted tooscillate within said rotating member, connections between said portsand the several vibrators, and automatically acting means for operatingsaid air-valve.

15. in a molding machine, the combination with a rotary flask-sustainingturret, a plurality of ask-can'iers mounted thereon, andpattern-carriers sustained by said flaskcanriers, of a pneumaticvibrator secured to each of said pattern-carriers, an air-valve molmted.upon said turret and connected with the air-supply, connections betweensaid air-valve and the several vibrators, and means including an opera`element extending axially through said turret for operating saidair-valve.

16. In a molding machine, the combination with a rotary flask-sustainingturret constructed with a hollow hub surmounted by a cap having an axialvalve seat and a plurality of ports leading therefrom, a plurality ofdesk-carriers mounted upon said turret, and pattern-carriers sustainedby said flask-carriers, of a pneumatic vibrator securedyto each of saidpattern-carriers, connections between said vibrators and said ports ofthe turret-cap, a rotary valve-plug applied to the valve-seat of saidcap, an axial valve-stem connected with said valveplug, valve-operatingmeans connected with said stem, and a connection between said valve-plugand the air-supply.

17. In a molding machine, the combination with a rotary desk-sustainingturret constructed with a hollow hub surmounted by acap having an axialvalve seat and a plurality of ports leading therefrom, a plurality offlask-carriers mounted upon said turret, and pattern-carrierssustained'by said desk-carriers, of a pneumatic vibrator secured to eachof saidI pattern-carriers, connections between said vibratorsvv and saidports of the turret-cap, a hollow rotary valve-plug having a portadapted to register successive y with those of said turret-cap, an axialtubular valve-stem connected with said valve-plug and with theair-supply, and valve-operating means connected w1th said stem. i

18. ln a molding machine, the combination with a rotary flask-sustainingturret constructed with a hollow hub, of a cap surmounting the same andhaving an axial valve-seat and a plurality of ports leading therefrom, afixed hollow valve-plug ar ranged `above said valve-seat and providedwith a lateral port adapted to be successively opened and closed fordelivery of a supply of air therefrom, a hollow rotary va ve-plug havinga port adapted to register successively with those of said turret-cap,and a second port communicating with the interior of the superposed xedvalve-plug, an axial tubular valve-stem connected with said valve-plugand with the air-supply, and valve-operating means connected with saidstem.

tion with a rotary flask-sustaining turret constructed with a hollowhub, and means for imparting to said turret step-by-step turningmovements, of a cap surmounting said turret and having an axialvalve-seat, and a plurality of ports leading therefrom, a fixed hollowvalve-plug sustained by said turret above said valve-seat and providedwith a lateral port, a stationary casing surrounding the fixedvalve-plug and provided with a normally closed port adapted to registerwith that of the fixed valve-plug, a hollow rotary valve-plug having aport adapted to register successively with those of said turret-cap, anda second port communicating with the interior of the superposed fixedvalve-plug, an axial, tubular valve-stem connected with said valve-plugand with the airsupply, and valve-operating means connected with saidstem.

20. In a molding machine, the combination with a rotary flask-sustaininturret constructed with a hollow hub, an' means for imparting to saidturret step-by-step turning movements, of a hollow valve-plug sustainedby and movable with said turret and having its interior in communicationwith the hollow hub of said turret and provided with a lateral port, astationar casing surrounding said valve-plug an pro- 19. ln a moldingmachine, the combinai vided with a normally closed port adapted toregister with that of the fixed valve-plug, anda connection between thehollow turrethub and the air-supply.

v operatn means connected with and actu'- atedb t 22. tion with a rotaryilask-susta'ining turret, and driving means therefor comprising acontinuously moving actuator carrying tur- -ret-detaining means wherebythe turret is periodically locked against movement, of a ydraulicvalve-chest provided withY an inlet chamber, an outlet chamber, andanintermediate series of independent distributing chambers, a valve forestablishing con-l nection between each of the distributing chambers andthe inlet and exhaust chambers, respectively, and means connected withand actuated by the turret-actuator and ada ted for independently oerating the sai valves chronously with the rotary movements o theturret.

23. In a molding machine, the combination with a rotary turret, aplurality of pattern plates mounted thereon and means for imparting tosaid turret ste -by-step rotary movements, of a series of Aheatingburners each disposed beneath one of said pattern plates in theintervals between movements of the turret, fuel supply pipes connectedwith said burners,and automatically acting means renderin said burnersineffective durin the trave of the turret.

24. l a molding machine, the combination with a rotary turret, aplurality of pattern-plates mounted thereon, and means for imparting tosaid turret ste -by-step` rotary movements, of a series of eatin burnerseach disposed beneath one of sain? patternplates in the intervalsbetween movements of the turret, fuel-supply pipes connected with saidburners, valves 1n said fuel-supply pipes, and automatically actingmeans lfor e turret-actuator.

a molding'machine, the combinaf "carriers, of a series of cleaning brus-means for impartin two subscribin reducing the fuel-supply of saidburners durin the travel of t e turret. l

25. n a molding machine, the combination with a rotary turret, aplurality of pat tern-plates mountedl thereon, and means for impartingto said turret step-.by-step rotary movements, of a series of stationaryheating burners each dis osed beneath one of said pattern plates 1n theintervals between movements4 of the turret, depending cleaning brushescarried by the turret intermediate said pattern-plates and adapted' tomaintain the operative face of an adjacent press-platen free from sand,valved fuelsupply pipes connected withl said burners, and means wherebythe flames of the several burners are reduced during the passage of suchbrushes over the same.

26. In a molding machine, the combina'- tion with a rotary turret, aplurality of flaskcarriers mounted thereon, pattern-carriers sustainedby said flask-carriers, and a pattern-plate sustained by each of saidatternllies with depending bristles interposed between and moving withsaid flask-carriers and adapted to clean the surface of an adjacentpressplaten preparatory to its engagement with each of saidpattern-carriers.

27. In a molding machine, the combination with a rotary flask-sustainingturret,

Ste I-by-step movements thereto, and a ask ling apparatus, of a scrapermovably mounted upona iixed support and adapted to remove sandjfrom theface of the turret and automatically acting means for defiecting saidscraper to. permit the flasks'to pass by it. l i

28. Inl a moldmg machine, the combination with a rotary ask-sustainingturret, means for imparting step-by-step operative movements thereto,and a flaskl ratus, of a scraper movably mounted mg appau on afiX'ed'support and adapted to be delirected from normal position byengagement with a flask upon the turret, and a spring for ingly holdingsaid scraper 1n normal -positionV inclined to the outer edge of theturrets In testimony whereof, I have signed my name to thisspecification, in thepresence of witnesses. y EXANDER MGCAR'IE.

Witnesses:

D. P. Bmrm, W. P. .Srswan'n

